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Record #00367Technology archive

Largest Tidal Power Station by Installed Capacity

South Korea's Sihwa Lake tidal power station has ten 25.4-MW turbines, totaling 254 MW of installed generating capacity, the world's largest tidal power station by this measure.

Verification status
VerifiedView verification details ↗
Last updated
2026-11-05
Category index
Technology

ARCHIVE VISUAL / 01

NOT TO SCALE

Current Record

254MW

Current record value

Holder
Sihwa Lake Tidal Power Station
Location
Sihwa Lake embankment, Ansan, Gyeonggi-do, Korea · Sihwa Lake Tidal Power Station site · Gyeonggi Province · South Korea
Start date
2011-08
Record status
VerifiedView verification details ↗Report an issue
OverviewRecord historyRelated recordsSources

Overview

Archive Note

The facility was constructed on the existing Sihwa seawall. Incoming high tides drive turbines as seawater enters the lake, producing electricity with a one-way flood-generation cycle.

K-water notes the project's dual purpose of energy generation and improving circulation in Sihwa Lake. Initial operation began in August 2011, with later construction and commercial-operation milestones.

Key information

Installed capacity
254 MW
Turbines
10 × 25.4 MW
Initial operation
August 2011
Designed annual output
About 552.7 GWh
Operator
K-water

Record history

1 Milestones
  1. 2011-08254 MWSihwa Lake Tidal Power StationSihwa Lake embankment, Ansan, Gyeonggi-do, KoreaCurrent Record

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Sources

Evidence & References

Verification basis and limitations

Verified

The record conclusion has sufficient verification support.

Basis: direct confirmation by an authority

Original record authority and operating organization explicitly support the comparative claim and measurement.

Verification assessment
2026-11-05
Last editorial review
2026-11-05

Current Entry identifies the current entry in this archive; it does not establish that the record is still held today.

Source IDSourcePublisherLink
SRC-001Hydroelectric and Tidal Power GenerationOfficialENCurrent recordK-waterSRC-002Highest capacity tidal power stationRegistryENCurrent recordGuinness World Records

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